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Finding the Fourth Proportional to 66,483.65, 91,781.30 and 51,342.32

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Solution

The fourth proportional to 66,483.65, 91,781.30 and 51,342.32 is: 70,878.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,483.65 : 91,781.30 = 51,342.32 : x
  2. Step 2: Convert to fraction form
    66,483.65/91,781.30 = 51,342.32/x
  3. Step 3: Cross multiply
    66,483.65x = 91,781.30 × 51,342.32
  4. Step 4: Simplify right side
    66,483.65x = 4,712,265,232.43
  5. Step 5: Solve for x
    x = 4,712,265,232.43/66,483.65
  6. Step 6: Final answer
    x = 70,878.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.